FASTENER HAVING IMPROVED WOBBLE CONTROL, FASTENING SYSTEM INCLUDING THE SAME, AND METHOD OF FORMING THE SAME

摘要

A fastener including a shank extending in a direction along a major axis; and a head comprising a hexalobular recess, wherein the hexalobular recess has an inner lobe surface having a radius satisfying 0.234A ≤ R_i ≤ 2.165A, wherein A is an outer diameter of the hexalobular recess, and R_i is the radius of the inner lobe surface.